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SE541856C2 - A method and a control arrangement for shifting a gearbox of a powertrain for a vehicle - Google Patents

A method and a control arrangement for shifting a gearbox of a powertrain for a vehicle

Info

Publication number
SE541856C2
SE541856C2 SE1751612A SE1751612A SE541856C2 SE 541856 C2 SE541856 C2 SE 541856C2 SE 1751612 A SE1751612 A SE 1751612A SE 1751612 A SE1751612 A SE 1751612A SE 541856 C2 SE541856 C2 SE 541856C2
Authority
SE
Sweden
Prior art keywords
electric machine
gearbox
gear wheel
planetary gear
output shaft
Prior art date
Application number
SE1751612A
Other versions
SE1751612A1 (en
Inventor
Jörgen Forsberg
Original Assignee
Scania Cv Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1751612A priority Critical patent/SE541856C2/en
Priority to DE112018005887.5T priority patent/DE112018005887T5/en
Priority to PCT/SE2018/051298 priority patent/WO2019125280A1/en
Publication of SE1751612A1 publication Critical patent/SE1751612A1/en
Publication of SE541856C2 publication Critical patent/SE541856C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/0403—Synchronisation before shifting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K2001/001—Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K2006/541—Transmission for changing ratio without reverse ratio using instead electric reversing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/48—Drive Train control parameters related to transmissions
    • B60L2240/486—Operating parameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/14—Trucks; Load vehicles, Busses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/14—Trucks; Load vehicles, Busses
    • B60Y2200/145—Haulage vehicles, trailing trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/70—Gearings
    • B60Y2400/73—Planetary gearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • F16H61/0403—Synchronisation before shifting
    • F16H2061/0422—Synchronisation before shifting by an electric machine, e.g. by accelerating or braking the input shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0039—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising three forward speeds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2002—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears
    • F16H2200/2005—Transmissions using gears with orbital motion characterised by the number of sets of orbital gears with one sets of orbital gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2094—Transmissions using gears with orbital motion using positive clutches, e.g. dog clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2306/00—Shifting
    • F16H2306/40—Shifting activities
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Structure Of Transmissions (AREA)
  • Arrangement Of Transmissions (AREA)

Description

A METHOD AND A CONTROL ARRANGEMENT FOR SHIFTING A GEARBOX OF A POWERTRAIN FOR A VEHICLE TECHNICAL FIELD The invention relates to a method and a control arrangement for shifting a gearbox of a powertrain for a vehicle. The invention also relates to a powertrain for a vehicle and to a vehicle provided with such a powertrain. The invention also relates to a computer program product and to computer-readable medium. In particular, the present invention relates to a method and control arrangement for a powertrain of a vehicle powered solely by batteries, so called BEV vehicles.
BACKGROUND AND PRIOR ART Powertrains for vehicles provided with an electric machine as sole propulsion source may have a gearbox with a first gear to be able to fulfil demands for startability and gradeability. The gear ratio of the first gear in the gearbox may be based on the weight and type of the vehicle. The gearbox may also have higher gears to make it possible to operate the electric machine at operating conditions where the efficiency of the electric machine may be good or optimal.
The gearbox may be provided between the electric machine and a propeller shaft coupled to the drive wheels of the vehicle. The gearbox may comprise an input shaft coupled to the electric machine and an output shaft coupled to the propeller shaft. The gearbox may comprise a planetary gear, which may be connected to an electric machine. The planetary gear may be connected to the output shaft. The gears in the gearbox may be shifted by connecting and disconnecting components of the planetary gear.
Planetary gears may comprise three components, which are rotatable arranged relative to each other namely, a sun gear wheel, a planet gear wheel carrier with planet gear wheels and a ring gear wheel. With knowledge of the number of teeth of the sun gear wheel and the ring gear wheel the relative speed of the three components can be determined during operation. The three components may be rotatable and may alternately be connected to an input shaft. The planet gear wheels may be rotatable mounted on the planet gear wheel carrier. The planet gear wheels may engage the sun gear wheel. The ring gear wheel may surround and engage the planet gear wheels. The ring gear wheel may be axially displaceable for shifting gears. When displacing the ring wheel axially, the ring gear wheel may be connected to the sun gear wheel, the planet gear wheel carrier and/or a housing which may surround the planetary gear. The three components may alternately be connected to an output shaft.
SUMMARY OF THE INVENTION However, for optimization regarding the startability of the vehicle and the efficiency of an electric machine as a propulsion source, there may be a need for a powertrain that may comprise a gearbox with different gear ratios to choose from. There may also be a need to further develop a powertrain that may comprise a gearbox that may have a plurality of gears that may cover different operation conditions for different types of the vehicles.
The object of the invention may therefore be to provide a method for shifting a gearbox of a powertrain for a vehicle, which gearbox may comprise different gear ratios to choose from.
A further object of the invention may be to provide a method for shifting a gearbox of a powertrain for a vehicle, which gearbox may have a plurality of gears that may cover different operation conditions for different types of the vehicles.
These objects may be achieved by the method according to the appended claims.
According to the invention the method for shifting a gearbox in of powertrain of a vehicle may comprise the step of changing the rotational direction of the electric machine during shifting from one gear to another in the gearbox. The powertrain may comprise an electric machine, a planetary gear provided in the gearbox, which planetary gear may be connected to the electric machine, and an output shaft of the gearbox, which may be connectable to the planetary gear. The planetary gear may comprise a ring gear wheel, a sun gear wheel, a planet gear wheel carrier and at least one planet gear wheel rotatably arranged on the planet gear wheel carrier.
The method may make it possible to shift the gearbox between pluralities of gears that may cover different operation conditions for different types of electric vehicles. The gearbox comprises a planetary gear and some of the components in the planetary gear may rotate in different directions. Thus, it may be possible to alternate the rotational direction of the electric machine in order to adapt the rotational direction of the electric machine to a rotational direction of a specific component of the planetary gear. Comparing to, for example, an internal combustion engine, the electric machine may be designed for changing the rotational direction without using complex components.
The gearbox may comprise solely one planetary gear. Thus, it may be possible to shift the gearbox between pluralities of gears that may cover different operation conditions for different types of electric vehicles using solely one planetary gear in the gearbox.
The propulsion source of the powertrain may be solely electrically powered. For example, the vehicle may be a battery electric vehicle, BEV. The powertrain may thus lack an internal combustion engine.
According to an aspect of the invention, the method may further comprise the step of, before the step of changing the rotational direction of the electric machine, when the ring gear wheel may be locked and prevented from rotation, and the planet gear wheel carrier may be connected to the output shaft so that a first gear is engaged in the gearbox: preventing the planet gear wheel carrier from rotating. When the planetary gear may stand still, the planet gear wheel carrier may be prevented from rotating by locking the planet gear wheel carrier to a component that may stand still, such as the gearbox housing.
According to a further aspect of the invention, the planet gear wheel carrier may be prevented from rotation by connecting the planet gear wheel carrier to a gearbox housing by means of a first connecting element. The planet gear wheel carrier may effectively be locked and prevented from rotation when the planet gear wheel carrier may be connected to the gearbox housing. The first connecting element may be an axial displaceable sleeve provided with a splines connection which may connect to a corresponding splines connection arranged on the gearbox housing and on the planet gear wheel carrier.
According to a further aspect of the invention, the method may further comprise the step of, before the step of preventing the planet gear wheel carrier from rotating: reducing the rotational speed of the planetary gear to a standstill condition. When the planetary gear may stand still, components of the planetary gear may easily be connected or disconnected from each other. When the planetary gear stand still, components of the planetary gear may easily be locked by connecting them to for example the gearbox housing. The rotational speed of the planetary gear may be reduced to a standstill condition by means of the electric machine or a braking arrangement. In the present specification, the term “standstill” means substantially standstill and may include a slight difference in speed between the different components of the planetary gear when shifting gears. The slight difference in speed between the components may simplify the connection of the components of the planetary gear.
According to a further aspect of the invention, the rotational speed of the planetary gear may be reduced to a standstill condition by means of the electric machine. The electric machine may also be arranged as a generator, which generates a braking torque on the planetary gear. Thus, the electric machine may brake the planet gear at some shifting step. This braking torque may reduce the rotational speed of the planetary gear to a standstill condition. However, there may be a slight difference in speed between the different components of the planetary gear when shifting gears. Therefore, the electric machine may brake the planet gear at some shifting step. This braking torque may reduce the rotational speed of the planetary gear, so that there may be a slight difference in speed between the different components of the planetary gear.
According to a further aspect of the invention, the method may further comprise the step of, before the step of reducing the rotational speed of the electric machine to a standstill condition: disconnecting the output shaft from the planetary gear. When the output shaft is disconnected from the planetary gear no torque or rotational speed from the output shaft may influence on planetary gear. This may simplify shifting of gears in the gearbox.
According to a further aspect of the invention, the method may further comprise the step of, before the step of disconnecting the output shaft from the planetary gear: generating torque balance between the planet gear wheel carrier and the output shaft by means of the electric machine. When shifting gears in the gearbox some of the components of the planetary gear may be disconnected and other components may thereafter or simultaneous be connected. Before disconnecting the output shaft from the planetary gear torque balance may be generated between the planet gear wheel carrier and the output shaft by means of the electric machine. This may be achieved by detecting the torque on the rotor of the electric machine and detecting the torque on the output shaft. Torque balance has been achieved when no torque or a small amount of torque may be transmitted between the planet gear wheel carrier and the output shaft.
According to a further aspect of the invention, the method may further comprise the step of, after the step of changing the rotational direction of the electric machine: synchronizing the speed between ring gear wheel and the output shaft by means of the electric machine. When changing the rotational direction of the electric machine, the ring gear wheel and the output shaft may rotate in the same direction. Thus, it may be possible to synchronize the speed between ring gear wheel and the output shaft by means of the electric machine.
According to a further aspect of the invention, the method may further comprise the step of, after the step of synchronizing the speed between ring gear wheel and the output shaft by means of the electric machine: connecting the ring gear wheel and the output shaft. When the rotational speed of the ring gear wheel and the output shaft is synchronized, the ring gear wheel and the output shaft may be connected.
According to a further aspect of the invention, the ring gear wheel and the output shaft may be connected by means of a second connecting element. The ring gear wheel may effectively be connected to the output shaft by means of the second connecting element. The second connecting element may be an axial displaceable sleeve provided with a splines connection which may connect to a corresponding splines connection arranged on the gearbox housing and on the planet gearwheel carrier.
According to the invention a control arrangement for shifting a gearbox of a powertrain of a vehicle, wherein the powertrain may comprise an electric machine, a planetary gear provided in the gearbox, which planetary gear may be connected to the electric machine, and an output shaft of the gearbox, which is connectable to the planetary gear. The planetary gear may comprise a ring gear wheel, a sun gear wheel, a planet gear wheel carrier and at least one planet gear wheel rotatably arranged on the planet gear wheel carrier. The control arrangement may be configured to changing the rotational direction of the electric machine during shifting from one gear to another in the gearbox. The control arrangement may make it possible to shift the gearbox between pluralities of gears that may cover different operation conditions for different types of vehicles. The gearbox may comprise a planetary gear and some of the components in the planetary gear may rotate in different directions. Thus, it may be possible to alternate the rotational direction of the electric machine in order to adapt the rotational direction of the electric machine to a rotational direction of a specific component of the planetary gear. Comparing to, for example, an internal combustion engine, the electric machine may be designed for changing the rotational direction without using complex components.
It will be appreciated that the embodiments described for the inventive method are all applicable to the control arrangement.
The objects are also achieved by a powertrain, provided with the above-mentioned control arrangement and an electric machine arranged for propulsion of the vehicle and connected to the gearbox.
The objects are also achieved by a vehicle, provided with the above-mentioned powertrain, according to the appended claims.
Additional objectives, advantages and novel features of the invention will be apparent to one skilled in the art from the following details, and through exercising the invention. While the invention is described below, it should be apparent that the invention may be not limited to the specifically described details. One skilled in the art, having access to the teachings herein, will recognize additional applications, modifications and incorporations in other areas, which are within the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS Below is a description of, as examples, preferred embodiments with reference to the enclosed drawings, in which: Fig. 1 schematically illustrates a vehicle in a side view with a gearbox, which may be shifted by a method according to an embodiment, Fig. 2 schematically illustrates a cross section of a gearbox which may be shifted by a method according to an embodiment, Fig. 3 shows a gear shifting scheme of the gearbox according to the embodiment in Fig. 2, Fig. 4 shows a flow chart for a method for shifting a gearbox of a powertrain for a vehicle according to an embodiment.
Fig. 5 shows a flow chart for a method for shifting a gearbox of a powertrain for a vehide according to an embodiment, and Fig. 6 shows a diagram of one version of a control arrangement for shifting the gearbox in the powertrain of the vehicle.
DETAILED DESCRIPTION OF THE DRAWINGS Fig. 1 shows schematically a vehicle 1 in a side view, provided with a powertrain 2, which may comprise a gearbox 4 with a gearbox housing 5. The gearbox 4 may be shifted by a method according to an embodiment. The powertrain 2 may also comprise an electric machine 6 as propulsion source. Drive wheels 10 may be coupled to the gearbox 4 via a propeller shaft 12.
Fig. 2 schematically illustrates a cross section of a gearbox 4 according to an embodiment. The electric machine 6 of the powertrain 2 may be provided with a rotor 14. The gearbox 4 may comprise a planetary gear 18.
The planetary gear 18 may be connected to the electric machine 6. The planetary gear 18 may comprise a ring gear wheel 22, a sun gear wheel 24, a planet gear wheel carrier 26 and at least one planet gear wheel 28 rotatable arranged on the planet gear wheel carrier 26.
The rotor 14 of the electric machine 6 may be connected to the sun gear wheel 24. The sun gear wheel 24 may selectively be connected to the ring gear wheel 22 and the planet gear wheel carrier 26 by means of a first connecting element 40. The ring gear wheel 22 and the planet gear wheel carrier 26 may selectively be connected to the gearbox housing 5 by means of the first connecting element 40. The ring gear wheel 22 and the planet gear wheel carrier 26 may selectively be connected to an output shaft 38 of the gearbox 4 by means of a second connecting element 42. The first and second connecting elements 40, 42 may be arranged as displaceable sleeves provided with splines, which connect with corresponding splines provided on the sun gear wheel 24, the planet gear wheel carrier 26, the ring gear wheel 22, the output shaft 38 and on the gearbox housing 5. The first connecting element 40 may be axially displaced by means of a first actuator 44. The second connecting element 42 may be axially displaced by means of a second actuator 46.
The torque and speed of the electric machine 6 may be controlled when shifting gears in the gearbox 4. Therefore, at least one sensor 48 may be arranged at the powertrain 8 for detecting torque and speed of the rotor 14, and also for detecting speed of the output shaft 38.
The electric machine 6, the first actuator 44, the second actuator 46 and the sensors 48 may be connected to a control unit 50 and/or a computer 52. A computer program product P may comprise instructions which, when the program is executed by the computer 52, may cause the computer 52 to carry out method steps for shifting gears in the gearbox 4.
Fig. 3 shows a gear shifting scheme of the gearbox 4 according to the embodiment in Fig. 2. The first connecting element 40 may be lockable and prevented from rotation when the gearbox 4 may be shifted into a first gear. The first connecting element 40 may be connected to the ring gear wheel 22, which may be locked and prevented from rotation by the first connecting element 40 when the gearbox 4 may be shifted into a first gear. The second connecting element 42 may connect the planet gear wheel carrier 26 to the output shaft 38 when the gearbox 4 may be shifted into a first gear. When the gearbox 4 may be shifted into a first gear and the vehicle 1 may be running in a forward direction the rotor 14 of the electric machine 6 may rotate in a first direction.
When the gearbox 4 may be shifted into a second gear, the electric machine 6 may be controlled to generate torque balance between second connecting element 42, the planet gear wheel carrier 26 and the output shaft 38. When torque balance may have been achieved, the second connecting element 42 may be displaced to a neutral position. Thereafter the planetary gear 18 may be stopped to a standstill position by means of the electric machine 6. At the standstill position of the planetary gear 18, the first connecting element 40 may be displaced to a position in which the planet gearwheel carrier 26 may be locked and prevented from rotation. Thereafter, the rotor 14 may be rotated in a second direction at a rotational speed, so that the speed of the ring gear wheel 22 may be synchronized with the speed of the output shaft 38. When the speed of the ring gear wheel 22 may be synchronized with the speed of the output shaft 38 the second connecting element 42 is displaced in order to connect the ring gear wheel 22 with the output shaft 38. The vehicle 1 may be running in the forward direction on the second gear. However, there may be a small difference in speed between the different components of the planetary gear 18 when shifting gears. The small difference in speed between the components may simplify the connection of the components of the planetary gear 18. The small difference in speed between the components may simplify the axially displacing the first and second connecting elements 40, 42.
The gearbox 4 may be shifted into a third gear by two shifting alternatives depending on how the torque should be transferred through the gearbox 4. According to a first alternative, the electric machine 6 may be controlled to generate torque balance between second connecting element 42, the ring gear wheel 22 and the output shaft 38. When torque balance may have been achieved, the second connecting element 42 may be displaced to a neutral position. Thereafter the planetary gear 18 may be stopped to a standstill position by means of the electric machine 6. At the standstill position of the planetary gear 18, the first connecting element 40 may be displaced to a position in which the planet gear wheel carrier 26 may be connected to the sun gear wheel 24. Thereafter, the rotor 14 may be rotated in the first direction at a rotational speed, so that the speed of the planet gear wheel carrier 26 may be synchronized with the speed of the output shaft 38. When the speed of the planet gear wheel carrier 26 is synchronized with the speed of the output shaft 38 the second connecting element 42 is displaced in order to connect the planet gear wheel carrier 26 with the output shaft 38. The vehicle 1 may be running in the forward direction on the third gear.
According to a second shifting alternative, when shifting from the second gear to the third gear, the electric machine 6 may be controlled to generate torque balance between first connecting element 40 and the planet gear wheel carrier 26. When torque balance may have been achieved, the first connecting element 40 may be displaced to a neutral position. Thereafter, the rotor 14 may be rotated in the first direction at a rotational speed, so that the speed of the planet gear wheel carrier 26 may be synchronized with the speed of the sun gear wheel 24. When the speed of the planet gear wheel carrier 26 may be synchronized with the speed of the sun gear wheel 24 the first connecting element 40 is displaced in order to connect the planet gear wheel carrier 26 with the sun gear wheel 24. The second connecting element 42 may remain its position, so that the ring gear wheel 22 is connected to the output shaft 38 by means of the second connecting element 42. The vehicle 1 may be running in the forward direction on the third gear. However, the torque will pass through the teeth of the planet gear wheels 28 and the ring gear wheel 22, which may lead to wear of the contact surfaces between the teeth of the planet gear wheels 28 and the ring gear wheel 22.
The vehicle 1 may be running in a rearward direction if the electric machine 6 may rotate in an opposite direction to that direction when the vehicle 1 is running in the forward direction.
Fig. 4 shows a flow chart for a method for shifting a gearbox 4 of a powertrain 2 for a vehicle 1 according to an embodiment. According to the embodiment the method for shifting a gearbox 4 of a powertrain 2 of a vehicle 1, may comprise the step of changing s101 the rotational direction of the electric machine 6 during shifting from one gear to another in the gearbox 4. For example, the rotational direction of the electric machine 6 may be changed when shifting from one forward gear to a subsequent (that is, one step higher or one step lower) forward gear. The powertrain 2 may comprise an electric machine 6 with a rotor 14, a planetary gear 18 provided in the gearbox 4, which planetary gear 18 may be connected to the electric machine 6, and an output shaft 38 of the gearbox 4, which may be connectable to the planetary gear 18. The planetary gear 18 may comprise a ring gear wheel 22, a sun gear wheel 24, a planet gear wheel carrier 26 and at least one planet gear wheel 28 rotatably arranged on the planet gear wheel carrier 26. The method may make it possible to shift the gearbox 4 between pluralities of gears that may cover different operation conditions for different types of vehicles 1. The gearbox 4 may comprise a planetary gear 18 and some of the components in the planetary gear 18 may rotate in different directions. Thus, it may be possible to alternate the rotational direction of the electric machine 6 in order to adapt the rotational direction of the electric machine 6 to a rotational direction of a specific component of the planetary gear 18. Comparing to, for example, an internal combustion engine, the electric machine 6 may be designed for changing the rotational direction without using complex components.
Fig. 5 shows a flow chart for a method for shifting a gearbox 4 of a powertrain 2 for a vehicle 1 according to an embodiment. The method may further comprise the step of, before the step of changing s101 the rotational direction of the electric machine 6, when the ring gear wheel 22 may be locked and prevented from rotation, and the planet gear wheel carrier 26 may be connected to the output shaft 38 so that a first gear is engaged in the gearbox 4: preventing s102 the planet gear wheel carrier 26 from rotating.
The method may further comprise the step of, before the step of preventing s101 the planet gear wheel carrier 26 from rotating: reducing s103 the rotational speed of the planetary gear 18 to a standstill condition.
The method may further comprise the step of, before the step of reducing s103 the rotational speed of the electric machine 6 to a standstill condition: disconnecting s104 the output shaft 38 from the planetary gear 18.
The method may further comprise the step of, before the step of disconnecting s104 the output shaft 38 from the planetary gear 18: generating s105 torque balance between the planet gear wheel carrier 26 and the output shaft 38 by means of the electric machine 6.
The method may further comprise the step of, after the step of changing s101 the rotational direction of the electric machine 6: synchronizing s106 the speed between ring gear wheel 22 and the output shaft 38 by means of the electric machine 6.
The method may further comprise the step of, after the step of synchronizing s106 the speed between ring gear wheel 22 and the output shaft 38 by means of the electric machine 6: connecting s107 the ring gear wheel 22 and the output shaft 38.
The method may be finished after step s107. The steps of the method do not necessarily have to be performed in the presented order. Some of the steps may also be performed in parallel.
Figure 6 shows a diagram of one version of a control arrangement 500 for shifting the gearbox 4 in the powertrain 2 of the vehicle 1. The control unit 50 described with reference to fig. 2 may in one version comprise the control arrangement 500. The control arrangement 500 may comprise a non-volatile memory 520, a data processing unit 510 and a read/write memory 550. The non-volatile memory 520 has a first memory element 530 in which a computer program, e.g. an operating system, may be stored for controlling the function of the control arrangement 500. The control arrangement 500 further may comprise a bus controller, a serial communication port, I/O means, an A/D converter, a time and date input and transfer unit, an event counter and an interruption controller (not depicted). The non-volatile memory 520 may also have a second memory element 540.
The computer program product may comprise routines for controlling the shifting the gearbox 4 in the powertrain 2 of the vehicle 1. A mode-diagram might be stored in the non-volatile memory. The computer program product P may comprise routines for shifting between different gears in the gearbox 4. This may at least partly be performed by means of the control unit 50 for controlling any of the electric machine 6, the first actuator 44 and/or the second actuator 46. This may comprise accessing information form said non-volatile memory, such as information regarding the shifting scheme, or the like.
The computer program product P may comprise routines for determining the torque and speed of the electric machine 6 and the output shaft 38. This may at least partly be performed by means of the first control unit 50. This may comprise receiving information from any of the at least one sensor 48. This may comprise receiving this information repeatedly. The program P may be stored in an executable form or in compressed form in a memory 560 and/or in a read/write memory 550.
Where it may be stated that the data processing unit 510 performs a certain function, it means that it conducts a certain part of the program which may be stored in the memory 560 or a certain part of the program which may be stored in the read/write memory 550.
The data processing device 510 can communicate with a data port 599 via a data bus 515. The non-volatile memory 520 may be intended for communication with the data processing unit 510 via a data bus 512. The separate memory 560 may be intended to communicate with the data processing unit via a data bus 511. The read/write memory 550 may be arranged to communicate with the data processing unit 510 via a data bus 514. When data are received on the data port 599, they can be stored temporarily in the second memory element 540. When input data received have been temporarily stored, the data processing unit 510 can be prepared to conduct code execution as described above.
Parts of the methods herein described may be conducted by the control arrangement 500 by means of the data processing unit 510 which runs the program stored in the memory 560 or the read/write memory 550. When the control arrangement 500 runs the program, methods herein described are executed.
The foregoing description of the embodiments has been furnished for illustrative and descriptive purposes. It is not intended to be exhaustive, or to limit the embodiments to the variants described. Many modifications and variations will obviously be apparent to one skilled in the art. The embodiments have been chosen and described in order to best explicate principles and practical applications, and to thereby enable one skilled in the art to understand the embodiments in terms of its various embodiments and with the various modifications that are applicable to its intended use. The components and features specified above may, within the framework of the embodiments, be combined between different embodiments specified.
It should be noted that the control arrangement according to the embodiment can be arranged to perform any of the steps or actions described in relation to the method. It should also be understood that the method according to the embodiment can further comprise any of the actions attributed to a feature of the control arrangement described. The same applies to the computer program product and the computerreadable medium.

Claims (15)

1. A method for shifting a gearbox (4) of a powertrain (2) of a vehicle (1), the powertrain (2) comprising: an electric machine (6); a planetary gear (18) provided in the gearbox (4), which planetary gear (18) is connected to the electric machine (6); and an output shaft (38) of the gearbox (4), which is connectable to the planetary gear (18); wherein the planetary gear (18) comprises a ring gear wheel (22), a sun gear wheel (24), a planet gear wheel carrier (26) and at least one planet gear wheel (28) rotatably arranged on the planet gear wheel carrier (26); the method comprising the step of: - changing (s101) the rotational direction of the electric machine (6) during shifting from one gear to another in the gearbox (4), so that the rotational direction of the electric machine (6) is alternated in order to adapt the rotational direction of the electric machine (6) to a rotational direction of a specific component (22, 24, 26) of the planetary gear (18).
2. The method according to claim 1, further comprising the step of, before the step of changing (s101) the rotational direction of the electric machine (6), when the ring gearwheel (22) is locked and prevented from rotation, and the planet gearwheel carrier (26) is connected to the output shaft (38) so that a first gear is engaged in the gearbox (4): - preventing (s102) the planet gear wheel carrier (26) from rotating.
3. The method according to claim 2, wherein the planet gear wheel carrier (26) is prevented from rotation by connecting the planet gear wheel carrier (26) to a gearbox housing (5) by means of a first connecting element (40).
4. The method according to claim 2 or 3, further comprising the step of, before the step of preventing (s102) the planet gearwheel carrier (26) from rotating: - reducing (s103) the rotational speed of the planetary gear (18) to a standstill condition.
5. The method according to claim 4, wherein the rotational speed of the planetary gear (18) is reduced to a standstill condition by means of the electric machine (6).
6. The method according to claim 4 or 5, further comprising the step of, before the step of reducing (s103) the rotational speed of the planetary gear (18) to a standstill condition: - disconnecting (s104) the output shaft (38) from the planetary gear (18).
7. The method according to claim 6, further comprising the step of, before the step of disconnecting (s104) the output shaft (38) from the planetary gear (18): - generating (s105) torque balance between the planet gear wheel carrier (26) and the output shaft (38) by means of the electric machine (6).
8. The method according to any one of the preceding claims, further comprising the step of, after the step of changing (s101) the rotational direction of the electric machine (6): - synchronizing (s106) the speed between ring gear wheel (22) and the output shaft (38) by means of the electric machine (6).
9. The method according to claim 8, further comprising the step of, after the step of synchronizing (s106) the speed between ring gearwheel (22) and the output shaft (38) by means of the electric machine (6): - connecting (s107) the ring gear wheel (22) and the output shaft (38).
10. The method according to claim 9, wherein the ring gear wheel (22) and the output shaft (38) are connected by means of a second connecting element (42).
11. A computer program product (P) comprising instructions which, when the program is executed by a computer (52), cause the computer (52) to carry out the method according to any one of claim 1-10.
12. A computer-readable medium comprising instructions which, when executed by a computer (52), cause the computer (52) to carry out the method according to any one of claim 1-10.
13. A control arrangement for shifting a gearbox (4) of a powertrain (2) of a vehicle (1), the powertrain (2) comprising: an electric machine (6); and a planetary gear (18) provided in the gearbox (4), which planetary gear (18) is connected to the electric machine (6); and an output shaft (38) of the gearbox (4), which is connectable to the planetary gear (18); wherein the planetary gear (18) comprises a ring gear wheel (22), a sun gear wheel (24), a planet gear wheel carrier (26) and at least one planet gear wheel (28) rotatably arranged on the planet gear wheel carrier (26); the control arrangement being configured to: - changing the rotational direction of the electric machine (6) during shifting from one gear to another in the gearbox (4), so that the rotational direction of the electric machine (6) is alternated in order to adapt the rotational direction of the electric machine (6) to a rotational direction of a specific component (22, 24, 26) of the planetary gear (18).
14. A powertrain (2) for a vehicle (1) comprising: a gearbox (2); an electric machine (6) arranged for propulsion of the vehicle (1) and connected to the gearbox (2), and a control arrangement according to claim 13.
15. A vehicle (1), wherein that the vehicle (1) is provided with a powertrain (2) according to claim 14.
SE1751612A 2017-12-21 2017-12-21 A method and a control arrangement for shifting a gearbox of a powertrain for a vehicle SE541856C2 (en)

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PCT/SE2018/051298 WO2019125280A1 (en) 2017-12-21 2018-12-12 A method and a control arrangement for shifting a gearbox of a powertrain for a vehicle

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